Feank h



(No Model.)

I. H. DE GUERRE.

GRATE.

Patented D50. 6, 1887.

Z C'Cnesses:

N. PKTERS. Phum-Lxlhcgnpher. Washinglom D. C-

UNITED STATES PATENT OFFICE.

FRANK H. DE GUERRE, OF SAN FRANCISCO, CALIFORNIA.

GRATE.

SPECIFICATION forming part of Letters Patent No. 374,176, dated December6, 1887.

Application filed January 10, 1887. Serial No. 223,956. (No model.)

To all whom, it may concern.-

Be it known that I, FRANK H. DE GUERRE, a citizen of the United Statesof America, and a resident of the city and county of San Francisco,State of California, have invented new and useful Improvements inAdjustments for Grates, of which the following is a full, clear, andexact description, referring to the accompanying drawings.

My invention relates to improvements in devices and mechanism forraising andlowering the grate of a stove, furnace, or fire-place.

Figure 1 is an elevation of the devices for raising and loweringthe-grate with the grate down. Fig. 2 is an elevation showing the grateraised. shaft, showing the right and left hand screwthreaded shaft andmovable nuts. Fig. 4 is a perspective view. Fig. 5 is a longitudinalside elevation of a modified form of devices for raising and loweringgrate.

Letter A refers to the grate; B, bed-plate; C, screw-shaft; D, left-handand D right-hand movable nuts; E,left-hand section and E righthandsection of rest-bar; F F, wedges or inclines secured to grate as appliedto a modified form of grate lifting and lowering device.

In my improved grate-lifting device I place the suitably-constructedscrewshaft C, which is provided with right and left hand screwthread, insuitable position on the bed-plate B. The rest-bar'I prefer to make intwo sec tions, E E, and they are suitably connected at such length asrequired. The rest-bar is also provided with suitable arms or elbows, ef, which are provided with suitable holes orslots for admitting thescrew-shaft C. Mounted and traveling upon said screw-shaft C are thenuts D D", screw-threaded in opposite directions, which approach andrecede from each other by turning said screw-shaft. These nuts D' D areprovided with U shaped portions or arms L L, and also with slots j, inwhich works the rest-bar. The U-shaped portions or arms are providedwith vertical slots at m for the reception of nuts, which form thepivotal connections for the angular arms or levers now to be described.The angular lever a is at its one end pivotally secured at point 9 tothe grate. Its other end is pivotally secured to the arm of nut D atpoint h. The lever c is pivotally secured at point t to the lever a. Theother end of the lever c is pivotally secured at point 70 to therest-bar F; The angular arm or lover b is pivotally secured at Fig. 3 isa plan of the screw point Z to the grate at its one end, while the otherend is pivotally secured to the nut D at point m. The lever d ispivotally and suitably secured to the rest-bar E at point a at its oneend. Its other end is secured pivotally at point 0 to the angular armI). The front end of the-screw-shaft C, which projects on the outside orfront of the stove, is made of angular form and suitably constructed forthe use of handle G.

For operating my improved devices I turn the handle and the screw-shaftaround toward the right. Then the nuts D D are drawn apart or toward thebed-plate, thereby forcing the arms a b c d toward an upright positionand V the grate A upwardly, thereby bringing the grate and the fuelnearer to the pot or kettle on the stove, and by turning the handle Garound and toward the left, then the nuts are brought nearer to eachother, and the devices 7 5 and the grate are lowered, and when the nutsare brought close together, until the grate rests upon the screw-shaft,then the grate may be turned over or around and the fuel dumped into thebox below the grate.

The modification, Fig. 5, shows the inclines F, which form a part of thegrate. Vl'hen the nuts D D are made to approach or recede from eachother, by the operation described,

the grate is raised and lowered thereby.

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is-

1. In a device for raising and lowering grates, the combination, withthe grate A, of 0 the screw-shaft C, nuts D D mounted and travelingthereon and provided with the slotted U shaped arms, and the rest-barconsisting of sections E E ending in arms 6 which embrace saidscrew-shaft C, substantially as 5 set forth.

2. The combination, in a device for raising and lowering grates, withthe grate A, of the screw-shaft having oppositely-threaded portions,nuts D D", the rest-bar consisting of sections E E, ending in arms cf,which embrace said screw-shaft, bent pivoted levers a b, and the leversc d, all arranged and operating in the manner and for the purpose setforth.

FRANK H. on cunnnn. [n 5.

W'itnesses:

ALPHONSO B. SMITH, H. HERBERT COOK.

